United States, Canada, Mexico. Typical grid values are summarized below for reference; local supply standards and permitted tolerances should always be verified before connecting equipment.
| Parameter | Reference | Engineering Note |
|---|---|---|
| Nominal Voltage | 120 V residential; 208/240/480 V common in commercial and industrial systems | Verify local tolerances and phase configuration. |
| Frequency | 60 Hz | Equipment must be rated for the local frequency. |
| Plug Types | A, B | Plug geometry does not by itself confirm voltage compatibility. |
Safety note: This is an educational reference, not a wiring specification. Electrical work and equipment connection must follow local codes, utility requirements, and qualified-person procedures. Split-phase 120/240 V systems are common in residential installations.
United Kingdom, Germany, France, Italy, Spain. Typical grid values are summarized below for reference; local supply standards and permitted tolerances should always be verified before connecting equipment.
| Parameter | Reference | Engineering Note |
|---|---|---|
| Nominal Voltage | 230 V residential; 400 V three-phase industrial systems | Verify local tolerances and phase configuration. |
| Frequency | 50 Hz | Equipment must be rated for the local frequency. |
| Plug Types | C, E, F, G | Plug geometry does not by itself confirm voltage compatibility. |
Safety note: This is an educational reference, not a wiring specification. Electrical work and equipment connection must follow local codes, utility requirements, and qualified-person procedures. Nominal supply is generally 230 V, with regional plug and socket variations.
Japan, China, South Korea. Typical grid values are summarized below for reference; local supply standards and permitted tolerances should always be verified before connecting equipment.
| Parameter | Reference | Engineering Note |
|---|---|---|
| Nominal Voltage | 100 V Japan; 220–230 V China and South Korea | Verify local tolerances and phase configuration. |
| Frequency | 50 or 60 Hz depending on country and region | Equipment must be rated for the local frequency. |
| Plug Types | A, B, C, I | Plug geometry does not by itself confirm voltage compatibility. |
Safety note: This is an educational reference, not a wiring specification. Electrical work and equipment connection must follow local codes, utility requirements, and qualified-person procedures. Japan uses different grid frequencies in eastern and western regions.
Australia, New Zealand. Typical grid values are summarized below for reference; local supply standards and permitted tolerances should always be verified before connecting equipment.
| Parameter | Reference | Engineering Note |
|---|---|---|
| Nominal Voltage | 230–240 V residential; 400 V three-phase industrial systems | Verify local tolerances and phase configuration. |
| Frequency | 50 Hz | Equipment must be rated for the local frequency. |
| Plug Types | I | Plug geometry does not by itself confirm voltage compatibility. |
Safety note: This is an educational reference, not a wiring specification. Electrical work and equipment connection must follow local codes, utility requirements, and qualified-person procedures. Industrial distribution commonly uses three-phase 400 V systems.